2009831279 has 2 divisors, whose sum is σ = 2009831280. Its totient is φ = 2009831278.

The previous prime is 2009831251. The next prime is 2009831281. The reversal of 2009831279 is 9721389002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2009831279 is a prime.

Together with 2009831281, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2009831209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1004915639 + 1004915640.

It is an arithmetic number, because the mean of its divisors is an integer number (1004915640).

Almost surely, 2^2009831279 is an apocalyptic number.

2009831279 is a deficient number, since it is larger than the sum of its proper divisors (1).

2009831279 is an equidigital number, since it uses as much as digits as its factorization.

2009831279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 2009831279 is about 44831.1418435890. The cubic root of 2009831279 is about 1261.9821156494.

The spelling of 2009831279 in words is "two billion, nine million, eight hundred thirty-one thousand, two hundred seventy-nine".